Limiting and buffering device of crane

Abstract

The utility model discloses a limiting and buffering device of a crane, which belongs to the technical field of limiting and buffering devices and comprises buffering components, a limiting component, a crane trolley, a guide rail and an abutting plate, the buffering components are distributed on two sides of the crane trolley, and each buffering component comprises a hydraulic damping rod. The hydraulic damping rod is fixedly connected to the outer wall of the crane trolley, limiting rings are arranged on the outer wall and the telescopic end of the hydraulic damping rod, a spring is connected between the two limiting rings in an abutting mode, a hydraulic pipe is connected to an oil nozzle of the hydraulic damping rod, the other end of the hydraulic pipe is connected with a limiting assembly, and the limiting assembly is arranged above the guide rail. The limiting assembly is used for clamping and rubbing the two sides of the guide rail. And through arrangement of the limiting assembly, under cooperation of the buffering assembly, buffering protection of the crane trolley is completed, and through double cooperation of the limiting assembly and the buffering assembly, the crane trolley is effectively prevented from directly colliding with the abutting plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of limiting buffer device, specifically is a crane limiting buffer device. BACKGROUND

[0002] The crane limiting buffer refers to limiting the moving range of the crane through specific devices and mechanisms during the operation of the crane and buffering when approaching the limit position to prevent the crane from exceeding the preset working range and ensure the operation safety.

[0003] According to the search, the Chinese utility model patent discloses a crane trolley limiting device (publication number: CN218371317U), which comprises a buffer mechanism, a support beam is fixed to the outer side of the main beam, limit mechanisms are arranged at the two ends of the support beam, the limit mechanism comprises a support pipe, the support pipe is fixed to the support beam, the top end of the support pipe is open and flush with the top surface of the support beam, a sliding block is slidably connected in the support pipe, an electric push rod is arranged between the sliding block and the bottom surface of the support pipe, the upper end of the electric push rod is hinged to the sliding block, and the bottom end of the electric push rod is hinged to the bottom of the support pipe; a support block is fixed to one side of the crane trolley close to the support beam, a vertical outer sleeve is fixed to the bottom of the support block, an inner sleeve is slidably sleeved at the lower end of the outer sleeve, a first compression spring is arranged between the top end surface of the inner sleeve and the support block, the first compression spring is sleeved in the outer sleeve, a roller is rotatably assembled at the lower end of the inner sleeve, and the roller is rollingly matched with the top surface of the support beam. The utility model has the advantages of simple structure and convenient use.

[0004] Although the above-mentioned patent can realize the buffer protection of the crane trolley through the buffer mechanism, the limit mechanism adopts the clamping type limiting treatment, the inner sleeve is abutted and limited in the support pipe to complete the limiting treatment of the crane trolley, when limiting, the inner sleeve is constantly impacted on the edge of the support pipe due to the displacement of the crane trolley, which causes deformation, thereby affecting the stability of the up-down extension, and further causing the extension failure, which easily causes the use state to be stuck, thereby affecting the service life, and meanwhile, the stability of the limiting is reduced.

[0005] Therefore, the utility model provides a crane limiting buffer device to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0006] (I) Technical problem solved

[0007] The utility model provides a crane limiting buffer device, which aims to solve the problems proposed in the background art.

[0008] (II) Technical scheme

[0009] In order to achieve the above object, the utility model provides the following technical scheme: A crane limiting buffer device, including buffer assembly, limiting component, crane trolley, guide rail and abutment plate, buffer assembly is distributed in both sides of crane trolley, and buffer assembly includes hydraulic damper, the outer wall of hydraulic damper is fixedly connected in the outer wall of crane trolley, the outer wall and telescopic end of hydraulic damper all are provided with limiting ring, and the spring is abutted between two limiting rings, the oil nozzle of hydraulic damper is connected with hydraulic pipe, one end of hydraulic pipe is connected with limiting component, and limiting component is placed above guide rail, limiting component is used for the clamping friction of both sides of guide rail.

[0010] As a preferred technical scheme of the application, the buffer assembly and the limiting component are provided with four groups, and each two groups of the limiting component are correspondingly distributed above the same guide rail, the both ends of the guide rail are fixedly connected with the abutment plates, and the abutment plates are used for abutting and limiting the buffer assembly.

[0011] As a preferred technical scheme of the application, each group of the buffer assembly corresponds to control a group of guide rails, the end of the limiting ring at the telescopic end of the hydraulic damper is fixedly connected with the rubber buffer pad, and the rubber buffer pad is used for the elastic buffer contact of the abutment plate.

[0012] As a preferred technical scheme of the application, the limiting component includes a cover body, the upper surface of the cover body is fixedly connected with a connecting plate, and the connecting plate is fixedly connected with the outer wall of the crane trolley through bolts, four groups of hydraulic cylinders are arranged in the cover body, the opening ends of the four groups of hydraulic cylinders are commonly connected with a pressure distribution pipe, and the other end of the pressure distribution pipe is connected with a hydraulic pipe.

[0013] As a preferred technical scheme of the application, one piston is slidably arranged in the cover body of each group, one end of the piston is fixedly connected with a brake block, and the brake block is used for abutting and rubbing the outer wall of the guide rail.

[0014] As a preferred technical scheme of the application, the cover body is in the shape of n, and the cover body is sleeved outside the guide rail, and the center line of the hydraulic cylinder and the center line of the guide rail are in the same horizontal plane.

[0015] As a preferred technical scheme of the application, during the contraction process of the hydraulic damper, the piston gradually abuts and contacts the outer wall of the guide rail, and during the expansion process of the hydraulic damper, the piston gradually shrinks into the interior of the hydraulic cylinder.

[0016] (Three) beneficial effects

[0017] The beneficial effects of the application are:

[0018] 1. This utility model, through the setting of a buffer component, with the cooperation of a hydraulic damping rod and a spring, can buffer the crane trolley when it hits the abutment plate, thereby slowing down the movement speed of the crane trolley and preventing damage to the crane trolley from the impact.

[0019] 2. This utility model, through the setting of the limiting component and the cooperation of the buffer component, when the hydraulic damping rod is impacted and retracts, its internal hydraulic pressure drives the piston and brake block in the limiting component to move through the hydraulic pipe and the pressure dividing pipe. Through the continuous mutual squeezing and friction between the brake block and the guide rail, the crane trolley is decelerated and positioned, and the crane trolley is further buffered and protected. Through its dual cooperation, the direct impact between the crane trolley and the abutment plate is effectively avoided. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 This is a schematic diagram of the centerline cross-sectional structure of the limiting component of this utility model;

[0022] Figure 3 This is a schematic diagram of the planar structure of the limiting component in the engaged state of this utility model;

[0023] Figure 4 This is a schematic diagram of the connection structure between the buffer component and the limiting component of this utility model;

[0024] Figure 5 This is a schematic cross-sectional view of the piston axis of this utility model.

[0025] In the picture:

[0026] 1. Buffer assembly; 11. Hydraulic damping rod; 12. Limiting ring; 13. Spring; 14. Rubber buffer pad; 15. Hydraulic pipe; 2. Limiting assembly; 21. Cover; 22. Connecting plate; 23. Pressure dividing pipe; 24. Hydraulic cylinder; 25. Piston; 26. Brake block; 3. Crane trolley; 4. Guide rail; 5. Abutment plate. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-5The utility model provides a kind of crane limiting buffer device, including buffer assembly 1, limiting assembly 2, crane trolley 3, guide rail 4 and abutting plate 5, buffer assembly 1 is distributed in the both sides of crane trolley 3, and buffer assembly 1 includes hydraulic damper rod 11, hydraulic damper rod 11 is fixedly connected in the outer wall of crane trolley 3, the outer wall of hydraulic damper rod 11 and telescopic end are all provided with limiting ring 12, and spring 13 is abutted between two limiting rings 12, hydraulic damper rod 11 oil nozzle is connected with hydraulic pipe 15, the other end of hydraulic pipe 15 is connected with limiting assembly 2, and limiting assembly 2 is placed above guide rail 4, limiting assembly 2 is used for the both sides clamping friction of guide rail 4, by the setting of structure, when buffer assembly 1 and abutting plate 5 impact, the contraction of hydraulic damper rod 11 can be worked by hydraulic transmission control limiting assembly 2, to limit the clamping of guide rail 4 by limiting assembly 2, realize the speed reduction processing of buffer assembly 1, avoid the impact of crane trolley 3 and abutting plate 5, and the greater the contraction force of hydraulic damper rod 11, the greater the clamping force of limiting assembly 2 to guide rail 4, and the better the deceleration effect.

[0029] Further, buffer assembly 1 and limiting assembly 2 are provided with four groups, and every two groups of limiting assembly 2 are correspondingly distributed above the same guide rail 4, and the both ends of guide rail 4 are fixedly connected with abutting plate 5, and the abutting plate 5 is used for the abutting limit of buffer assembly 1, after buffer assembly 1 is pre-contacted with abutting plate 5 for buffering protection, if crane trolley 3 does not stop, then through the double protection of limiting assembly 2, the speed reduction buffering protection of crane trolley 3 is realized, to avoid the impact of crane trolley 3 and abutting plate 5.

[0030] Further, each group of buffer assembly 1 corresponds to control a group of guide rails 4, and the end of the telescopic end limiting ring 12 of hydraulic damper rod 11 is fixedly connected with rubber buffer pad 14, and the rubber buffer pad 14 is used for the elastic buffering contact of abutting plate 5, through the elastic structure of rubber buffer pad 14, avoid hard impact contact with abutting plate 5, further reduce the resonance reaction to crane trolley 3, improve its buffering protection effect.

[0031] Further, the limiting assembly 2 comprises a cover body 21, the upper surface of the cover body 21 is fixedly connected with a connecting plate 22, and the connecting plate 22 is fixedly connected to the outer wall of the crane trolley 3 through bolts, four groups of hydraulic cylinders 24 are arranged in the cover body 21, the opening ends of the four groups of hydraulic cylinders 24 are jointly connected with a pressure distribution pipe 23, one end of the pressure distribution pipe 23 is connected with a hydraulic pipe 15, and the internal hydraulic pressure of the hydraulic damping rod 11 in the contracted state is transmitted to the hydraulic cylinders 24 through the connection of the hydraulic pipe 15 and the pressure distribution pipe 23, so as to drive the pistons 25 to displace, that is, the brake blocks 26 can be in extrusion contact with the guide rails 4 to complete the speed reduction process, when the crane trolley 3 stops, when the reverse displacement is performed, the hydraulic damping rod 11 is reset, the pistons 25 can be reset, the extrusion friction of the guide rails 4 is released, and then the reverse displacement of the crane trolley 3 can be realized.

[0032] Further, one piston 25 is slidably arranged in the inside of each cover body 21, one end of the piston 25 is fixedly connected with a brake block 26, the brake block 26 is used for abutting friction with the outer wall of the guide rail 4, the cover body 21 is in an n-shaped structure, the cover body 21 is sleeved outside the guide rail 4, the center lines of the hydraulic cylinders 24 and the guide rail 4 are in the same horizontal plane, and the uniformity of the extrusion friction of the two brake blocks 26 on the guide rail 4 is ensured, the piston 25 gradually abuts and contacts the outer wall of the guide rail 4 during the contraction of the hydraulic damping rod 11, and the piston 25 gradually contracts into the inside of the hydraulic cylinder 24 during the extension of the hydraulic damping rod 11, through the mutual linkage, the buffer device can perform double buffering protection on the crane trolley 3, and the buffering performance and stability are greatly improved.

[0033] Working principle; when the crane trolley 3 is displaced to the end and collides with the abutting plate 5, the contact of the rubber buffer pad 14 makes the hydraulic damping rod 11 be pressed and contracted, the internal hydraulic pressure of the hydraulic damping rod 11 is transmitted to the hydraulic cylinders 24 through the hydraulic pipe 15 and the pressure distribution pipe 23 during the contraction of the hydraulic damping rod 11, so as to drive the pistons 25 and the brake blocks 26 to extend out, the brake blocks 26 are in extrusion friction with the outer wall of the guide rail 4, the speed reduction buffering of the crane trolley 3 is completed, the double buffering protection of the buffer assembly 1 and the limiting assembly 2 effectively avoids the collision between the crane trolley 3 and the abutting plate 5, and the safety of the operation of the crane trolley 3 is improved.

[0034] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A crane limiting and buffering device, characterized in that: The system includes a buffer assembly (1), a limiting assembly (2), a crane trolley (3), a guide rail (4), and an abutment plate (5). The buffer assembly (1) is distributed on both sides of the crane trolley (3), and the buffer assembly (1) includes a hydraulic damping rod (11). The hydraulic damping rod (11) is fixedly connected to the outer wall of the crane trolley (3). The outer wall and the telescopic end of the hydraulic damping rod (11) are provided with limiting rings (12), and a spring (13) abuts between the two limiting rings (12). A hydraulic pipe (15) is connected to the oil nozzle of the hydraulic damping rod (11). The other end of the hydraulic pipe (15) is connected to the limiting assembly (2), and the limiting assembly (2) is placed above the guide rail (4). The limiting assembly (2) is used for clamping friction on both sides of the guide rail (4).

2. The crane limiting buffer device according to claim 1, characterized in that: The buffer assembly (1) and the limiting assembly (2) are each provided with four sets, and each pair of limiting assemblies (2) are distributed above the same guide rail (4). Both ends of the guide rail (4) are fixedly connected with abutment plates (5), and the abutment plates (5) are used for the abutment and limiting of the buffer assembly (1).

3. A crane limiting buffer device according to claim 2, characterized in that: Each set of buffer components (1) controls a set of guide rails (4). A rubber buffer pad (14) is fixedly connected to the end of the limiting ring (12) at the telescopic end of the hydraulic damping rod (11), and the rubber buffer pad (14) is used for elastic buffer contact with the abutment plate (5).

4. A crane limiting buffer device according to claim 3, characterized in that: The limiting component (2) includes a cover (21), and a connecting plate (22) is fixedly connected to the upper surface of the cover (21). The connecting plate (22) is fixedly connected to the outer wall of the crane trolley (3) by bolts. Four sets of hydraulic cylinders (24) are provided inside the cover (21). The open ends of the four sets of hydraulic cylinders (24) are connected to a pressure dividing pipe (23), and the other end of the pressure dividing pipe (23) is connected to a hydraulic pipe (15).

5. A crane limiting buffer device according to claim 4, characterized in that: Each of the enclosures (21) has a piston (25) slidably disposed inside. One end of the piston (25) is fixedly connected to a brake block (26), and the brake block (26) is used for abutting friction against the outer wall of the guide rail (4).

6. A crane limiting buffer device according to claim 5, characterized in that: The cover (21) has an n-shaped structure and is fitted outside the guide rail (4). The centerline of the hydraulic cylinder (24) and the centerline of the guide rail (4) are on the same horizontal plane.

7. A crane limiting buffer device according to claim 5, characterized in that: During the contraction of the hydraulic damping rod (11), the piston (25) gradually comes into contact with the outer wall of the guide rail (4), and during the extension of the hydraulic damping rod (11), the piston (25) gradually retracts into the hydraulic cylinder (24).

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